This class handles configuration info for the Toolbox instances
that will eventually be produced by ToolboxFactory.
It contains ToolConfigurations for tools which will be managed
by those toolboxes, as well the toolboxes' scope and
any other Propertys which you intend to be available
to all the tools in the toolbox.

Most users will not find themselves directly using the API of this class.

NOTE: Two instances of this class are considered equal() if their scopes
are equal. This is not the intuitive behavior at this level but is done
to facilitate intuitive behavior in the higher APIs, which are much more
likely to be used directly.